Telegraphy.



No. 894,820. PATENTED AUG. 4, 1908.

- P. B. DELANY.

TELEGRAPHY.

APPLICATION FILED MAY 23, 1907.

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,4 i 53 l 5 Fa "Att t: I a E J. I M by PATENTED 'AUG. 4, 1908.

. P. B. DELA NY.

TELEGRAPHY. APPLICATION FILED MAY 23, 1 907.

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P. B. DELANY.

TELEGRAPHY. APPLICATION FILED nu 2a, 1907.

Q (Q1nvehtbr: I m/L4 PATENTED AUG. 4, 1908.

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PATRICK B. DELANY, OF SOUTH ORANGE, NEW JERSEY.

TE LE GR APHY Specification of Letters Patent.

Patented Aug. 4, 1908.

Application filed May 23, 1907. Serial No. 375,199.

To all whom it may concern:

Be it known that I, PATRICK B. DELANY, a citizen of the United States,residing in South Orange, county of Essex, State of New Jersey, haveinvented certain new and useful Improvements in Telegraphy, of which thefollowing is a specification.

This invention relates to a system of telegraphy in which a plurality ofdots is transmitted as a single impulse of a length corresponding to thenumber of dots it represents, and which at the receiver is disintegratedinto the component dot signals. Such a system is disclosed inapplications heretofore filed by me. In those applications areshownlocal electro-magnets interactingly controlled to effect disintegrationof a received solid im pulse of current into the dot signals itrepresents. Such local magnets, one controlling the circuit of another,effectively carry out the system referred to, which may of course bepracticed in other ways.

The present invention deals with special apparatus and arrangementsthereof to disintegrate solid impulses into their component shortsignals, that experience has shown to be particularly simple andeffective.

In place of the interacting electro-magnetic apparatus referred to, anelectro-magnetic mechanical dot maker is employed, its function at thesending end being to guide the operator by converting into dots or shortsigna s, the long impulses representing a plurality of dots, and at thereceiving end to perform the same functions under control of the relayfor the delivery or transcription of the signal representedcompositively by a long transmitted impulse.

In the accompanying drawings: Figure 1; shows the electro-magneticmechanical dot maker as applied to the system of secret'telegraphy overa single wire at the sending and receiving station and controlled bypolarized relays; Fig. 2, shows its application to secret telegraphyover two wires and controlled by neutral relays; Fig. 3, shows it asapplied to secret working according to the system used on cables.

Referring to Fig. 1, when key K at station A is pressed against contact0, one pole of the split battery I) is connected to line L through wirew, polarized relay P, wire w, polarized relay P, main line L topolarized relays P, P and wire 10 to earth at station B. The effect ofthis impulse on polar relays P, P is to hold their armature' leversagainst stops 8, s and at the same time the armature levers of relays P,P are moved to their stops 8, 8 When these latter armature levers leavestops 6, f, the normally closed local circuits of vibrators V, V areopened. These vibrators each consist of an electro-magnet c, an armature0 carried by an arm if, supported by a spring blade '0 rigidly mountedin a fixed block 1). Above the armature the arm 12 is provided with anadjustable sliding weight a by means of which the rate of vibration ofthe part 12 41 may be regulated. Normally the magnet 12 attracts thearmature lever, utting the spring supporting-blade o unc er tension andholding the armature lever against its front sto o. is releasec by theopening of the circuit of the magnet, the armature lever will make ateach vibration contact with spring contact d, thereby closing andopening the circuits of the sounders S,-S making dots so long as the keyK is held in closed position. When the lever K is pressed againstcontact 0 for a dash, the relays P, P are energized by current from theother pole of battery I) through wires h, 'L, w, the armature levers ofrelays P P being held firmly against their stops 6, f.. When thearmatures of P P reach their stops 3', k, the sounders S, S are closedand remain so until lever K has been released and the relay armaturesare returned to their stops 8, s by their springs p, q, similar to theaction of the armatures of the relays P, P after'withdrawal of thecurrent. In this way it will be seen that while the single impulsesreresenting dots and of a length correspon ing to the number of dots to besounded or recorded are passing through the circuit, these impulses arebeing disintegrated or divided up into actual dots at both stations.This occurs with a degree of perfection unattainable by transmission ofindividual dots over the line. Furthermore, as the number of impulsessent over the line is reduced about thirty percent. and as thosetransmitted in most cases are of comparatively long duration, muchlonger circuits maybe worked and at much higher speeds.

Fig. 2, represents the electro-magnetic mechanical auto-dot maker asapplied to se- When the armature lever line L and w to earth,

cret telegraphy employing two wires, one for l ber of dots the dots andthe other for the dashes, neutral relays being employed. When key K ispushed to contact 0, the main battery I) is sent to the distant stationvia wire e0 relay R line L and relay R to earth or battery. This impulseactuates relays R R and when their armatures leave their back stops 6and f the circuits of the magnets of the electro-magnetic mechanicalvibrators VV are broken and the sounders S S operated as alreadydescribed in connection with Fig. 1. When lever K is pressed to contactpost 0 for a dash, the current from battery 6 goes to the distantstation via wire to, relay R line L, relay R to earth or battery. Thearmatures of relays R R close the sounders circuits as alreadydescribed.

Fig. 3, shows diagrammatically the electromagnetic mechanical automaticdot maker applied to cables or lines operated on the cable plan, usingdot signals for dashes as well as dots, the polarity of the impulsesdetermining their character. When key K is pressed down for a dot, onepole of battery is connected to earth through wire 20 key K lowercontact bar it and wire w, leaving the other pole of the battery to linethrough wire of, upper contact bar and key K Simultaneously with thetransmission of this impulse, the circuit of the automatic dot maker Vis broken at the insulated contacts Z, Z, where it is normally closedvia wire 10 local battery m, magnet of vibrator V and wire'w So long askey K is held down, the vibrator V will operate its sounder S so thatif, for instance, four dots are to be transmitted, the operator holdsthe'key down until the sounder has sounded that number. Similarly whenkey K is pressed down, the circuit of automatic dot maker V is brokenfrom its normally closed condition through insulated contacts a, n, wireto, circuit of magnet of vibrator V wire w, battery m, wires w and w. Asin the case of auto matic dot maker V the vibrator of V is re leased andits sounder S actuated so long as key K is held down,thus notifying theoperator when the requisite number of dots has been sent. The longimpulses sent into the line may be received on relay P controllingvibrator V 4 and its sounder S. When the key K is pressed down for atime, representing one or more impulses, the polarized relay P willrespond breaking the circuit of its vibrator V and producing dots on itssounder S. IVhen the dash key K is pressed down, polarized relay P isactuated, breaking the circuit of its vibrator V causing dotsrepresenting dashes to be made on its sounder S. In this way, the longimpulses representing a plurality of dots or dashes, are converted intotheir component parts or signals corresponding with the num made at thetransmitting station by the vibrators V V The sounders S, S may ifdesired, repeat into another circuit. The sounders S", S should havedifferent tones, if the operator is receiving by sound, so that he mayreadily distinguish between the short signals that represent dots andthe short signals that represent dashes.

Of course usual switches for connecting the apparatus for transmissionor reception are to be provided. Such a switch is shown at X in Fig. 2.

I claim:

1. In telegraphy a transmitter having an elastic vibrator, a magnetnormally maint'aining the vibrator at rest under tension, a normallyclosed local circuit for said magnet, a signal manifesting instrument,its local circuit and contacts by which its circuit is controlledregularly by the vibrator when the latter is in operation, a key andtransmitting source of electric energy and circuit connections andcontacts whereby when the key is closed the vibrator magnet isdecnergized and the vibrator released to vibrate at its regular normalrate and a continuous current sent to line, combined with a distantreceiver having a like vibrator, normally energized magnet maintainingit under tension, a signal manifesting instrument controlled by thevibrator and a relay energized by said transmitted impulse and acting toopen the normally closed circuit of the vibrator.

2. In telegraphy a transmitter comprising a key and transmitting sourceof electric en ergy an elastic vibrator normally maintained undertension and means whereby when the key is closed to the source ofelectric energy said vibrator is released to vibrate at its normal rateand a continuous signal impulse is transmitted, combined with a receiverhaving a relay actuated by said impulse and a like vibrator normallymaintained under tension and released when the relay is actuated.

3. In telegraphy a transmitting key or member, a polarized relay and itssource of energy controlled by said member, an automatic dot maker, itscontrolling electro magnet; and circuit connections whereby the circuitof the dot maker magnet is established while the armature lever of thepolarized relay is in open position and broken when said. lever startsto its closed position.

4. In telegraphy, a transmitter having a dot contact and a dash contact,electro-magnetic means controlled by said transmitter and its dotcontact for holding inoperative against its normal retractile tension acircuit controlling vibrator, a main line, an electromagnet in said mainline at the receiving end, a source of electric energy controlled bysaid transmitter for actuating said electro magnet, means controlled bysaid electro-magnet for holding inoperative against its normalretractile tension a circuit controlling vibrator, means controlled bysaid transmitter and said electro magnet for simultaneously putting intovibration the said two vibrators and means controlled by the vibratorsto automatically produce corresponding short or dot signals at thesending and receiving ends of the main line.

In testimony whereof, I have hereunto Witnesses:

JOHN M. LEE, L. F. BROWNING.

